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Transcriptional upregulation of microtubule-associated protein 2 is involved in the protein kinase A-induced decrease

Yuxi Zhou1, Sihan Wu1, Chaofeng Liang1

  • 1Department of Pharmacology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, China (Y.Z., S.W., Y.L., K.L., B.L., M.S., Y.H., W.Z., D.X., J.H., G.Y.); Department of Neurosurgery, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China (C.L.); Department of Imaging, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China (Y.Z., Z.K.); Department of Microbiology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, China (J.H.).

Neuro-Oncology
|May 28, 2015
PubMed
Abstract

Insights

Protein kinase A (PKA) activation inhibits malignant glioma cell invasion by upregulating microtubule-associated protein 2 (MAP2). This discovery offers a new therapeutic strategy for treating aggressive brain tumors.

Area of Science:

  • Neuro-oncology
  • Cell Biology
  • Molecular Biology

Background:

  • Malignant glioma, a lethal brain tumor, is characterized by invasive growth and recurrence.
  • Current anti-invasion therapies face challenges like drug resistance and poor selectivity.
  • Previous research indicated protein kinase A (PKA) activation promotes glioma cell differentiation.

Purpose of the Study:

  • To investigate if activating the PKA pathway can inhibit human glioma cell invasion.
  • To elucidate the molecular mechanisms underlying PKA's effect on glioma invasion.

Main Methods:

  • Utilized small molecule inhibitors and RNA interference.
  • Employed wound healing and Matrigel transwell assays.
  • Performed microscopic observation, chromosome immunoprecipitation, and quantitative real-time PCR.

Main Results:

  • PKA activation significantly reduced glioma cell invasion.
  • This effect was mediated by the transcriptional upregulation of microtubule-associated protein 2 (MAP2) via the PKA pathway.
  • MAP2 activation led to microtubule stabilization and reduced cell invasion, with STAT3 identified as a key regulator in this process.

Conclusions:

  • PKA activation presents a promising therapeutic target for inhibiting glioma invasion.
  • Downstream effectors, including STAT3 and MAP2, partially mediate PKA's anti-invasion effects.
  • This study provides a foundation for developing novel anti-glioma therapies targeting the PKA pathway.
Keywords:
MAP2cAMP/PKA pathwayinvasionmalignant gliomamicrotubule

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